package com.hdax.gulimall.ware.config;


import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;


/**
 * Feing进行远程调用，请求头丢失的问题
 */
@Configuration
public class GuliFeignConfig {

    /**
     * 远程调用之前执行
     * 给远程服务放入Cookie
     * @return
     */
    @Bean
    public RequestInterceptor requestInterceptor(){
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate requestTemplate) {
                //拿到刚进来的请求数据
                requestTemplate.header("__token", "aa");
                ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                if (requestAttributes != null) {
                    HttpServletRequest request = requestAttributes.getRequest();//老请求
                    if (request != null) {
                        //2、同步请求头的数据（主要是cookie）
                        //把老请求的cookie值放到新请求上来，进行一个同步
                        String cookie = request.getHeader("Cookie");
                        requestTemplate.header("Cookie", cookie);
                    }
                }
            }
        };
    }
}
